1. The problem statement, all variables and given/known data A 30cm diameter wheel rolls without slipping at 120rpm. The point of contact with the ground has an instantaneous speed of: a-5.2mm/s b-1.04cm/s c-2.6 m/s d-zero 2. Relevant equations I'm not really sure about my final answer but i think is d-zero because i have a diagram of a wheels that has 0m/s on the bottom of the wheel. 3. The attempt at a solution If the correct answer is not zero i think i will need the following formula I=MR^2 but i'm only given diameter and rpm's so i don't know if there's anohter formula i'm missing.